Patents by Inventor Charles E. Hyman

Charles E. Hyman has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Aircraft power and phase converter
    Patent number: 4103325
    Abstract: A compact power and phase converter is adapted to utilize the single-phase and direct current power outputs of a conventional aircraft power supply, converting such outputs into stable three-phase power on wye-connected, grounded neutral distribution lines. An automatic current limiter provides overload protection for the converter when excessive output current is demanded.
    Type: Grant
    Filed: March 18, 1977
    Date of Patent: July 25, 1978
    Assignee: Sperry Rand Corporation
    Inventors: Charles E. Hyman, Alfred C. Setter